Shock-absorber.



B. V. HARTFORD.

SHOCK ABSORBER.

APRLIUATIOH PILBD-DEGu lO, 1910.

Patented Jan. 12, 1915.

4 SHEETS-SHEET 1.

E. V. HARTFORD.

snocx ABSORBER. APPLIOATION FILED DEC. 10, 1910.

Patented Jan. 12, 1915.

E. V. HARTFORD.

SHOCK ABSORBER.

Z\PPLT\'1.=I'ION FILED 1120.10. 1910.

1 1 2&6 1 2 Paiented J an. 12, 1915.

4 SHEETi-SHEBT 3.

E. V. HARTFORD.

SHOCK ABSORBER. APPLIOATION FILED 1520.10, 1910 Patented Jan. 12, 1915.

4-SHEETS-SHBBI 4.

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snack-Assumes.

To all whom it may 0012 eem 1 Be it known that I, EDWARD V. HART- onn, a citizen of the United States, residing at Deal, in the county of State oi. New Jersey, have invented certain new and useful Improvements in Shock- Absorbers, of which the. following is a full, clear, and exact specification.

This invention relates to shock absorbers andv has for an object to provide an improved dev'ic'e of greater efficiency will be had, not only through the proper relation of the various parts which enter into the structure, but also in the special formation and manner of manufacture of some of these parts thenr selves. .Not only is the life of the various parts had in mind in the. design of the structure as a whole, but the friction is so distributed that there willbe friction applied at a plurality of points upon the movement of the parts of the vehicle between which the device will he placed.

In the drawings accompanying and forming a part of this specification a practicable embodiment of one form of my invention is illustrated and in which drawings Figure 1 represents a side elevation. of the shock absorber embodying one forniof the invention. Fi 2 is a top view of the device illustrated in Fig. 1. Fig. 3 is a section taken on a plane at about .the Fig. 4 is a view taken on a plane at about the line 4-4: of Fig. 1. Fig. 5 is a'section taken on a plane at about 'the line.5-5 of Fig. 1. Fig. 6 is a. detail of a portion vof the face of one of the friction disk cups. Fig. 7 is an elevation of a form of bushing shown surrounding the pivot pins at the ends of the arms, those pivot pins which areemployed for securing the device to the vehicle parts. Fig. 8 is a detail view of the blank from which the bushing shown in Fig. 7 1S made.

Fig. 9 is an end View of the dust-band or housing which surrounds the central portion of the device. Fig. 10 is a side elevation of an anti-friction bearing which is shown in Fig. 4, the upper end or arm. Fig. 11 is a face view and elevation vof the-anti-frict ion bearing shown in Fig. 5, the lower end or arm.

Fig. 1-2 is an elevation oftl'iepivot end of the center arm or the upper arch in Fig. 1. and a cross-sec- Fig. 13 is a simila arms, the lower view of one of the outer face view of one arm in F ig. 1. .Fig. 14: is a Specification of Letters Patent.

Monmouth and.

this character. wherein 'shown provided with ings. 4,

line 33 of Fig. 1.

Patented Jan. 12, 1915.

Application filed December 10, 1910. Serial No. 596,669. 7

of the anti-fricti on disk cups for use at the I arm ends; and Fig. 15 is an elevation of one of the pivot pins for the arm ends.

My improvements, in the present illustration, is shown embodying. some of the features of the present commercial form of shock absorber and. is made up with somewhat of the general external appearance oi. those nowon. the market. The device is shown as embodying a pair of outer arms 1 and 2, which will be fastened to some part of the vehicle, as for instance, the axle, and between the ends of which pair of arms is interposed the end. of a central arm 3, which will be securedat its free end to another part. of the vehicle. movable relatively to the former part, as. for instance, the body of the vehicle. From the fact that the single or central arm is described as being attached to the vehicle body, which will normally be above. the axle, the arm 3 m ght be called the upper arm and the pair of arms 1 and 2 the lower arm. The arms of the pair are openings 4-, through pivot pin 5, will pass. Such openare shown provided with lateral openings 6. These lateral openings 6, in one of the arms, as for instance, the arm 1 will receive pins 7, carried'iby the head 8, of the pivot pin 5. By this means the pivot pin is held from rotary movement relatively to the arm 1. Since the arnisof the held together at their free ends, the pivot which a .pin will be held from relative rotation in rearms 1 and 2 may be pivotally connected A bushing 10,-which will. be de together.

is shown interposed scribed in detail later, between the pivot pin opening 9. Disks 11 upon each side of the-arm are shown mounted 3," where this is interposed between the arms 1 and-B, and" these disks will boot some suitable material to afford a non-abrading friction between the parts when moved one other. Each of the disks 11 is shown mounted in a cup 12. which cups lie flat upon the inner faces of the outer arms 1 and 2. These cups will be provided adjacent pair are 5 and the edges of the relatively to the i the openings 13, which receive the pivot pin,

with lateralropeningsl-l for receiving the lugs at the ends of the bushing 10, and such. lugs 15 will be long enough to pass into the lateral openings 6, in the arms '1 and 2; By this means the cups 12 are'pre- A vented from rotation-relative t0 the arms 1 and 2, so that, the friction will-take place betwe'en the disks 11 and the cups 12 and between the disks 11 and the sides of the arm 3. p

The portions ofst'ructure'above described 7 will-be held in place, in some suitable mannet, as for instance, bymeans of a spring spider washer 16, tension on which will be applied by means of a nut 17 mountedon the pivot pin5.

For the purpose of preventing the en (see-Fig. 9); The ring is providedwith aslot 21,,embracing the arm 3 beyond its en-' largedfriction portion. This structure af-. fords an'inexpensive and efiicient fastening for the dust ring, It also assures the proper positionin of the ring'upon reassemblage of the devlcewithout any effort on the part cf the mechanic, since it prevents displace- 'ment on'disasseinblage.

A dust-ti ht joint about the pivot pin may be secured by means'of a dust-guard 22, closely engaging the pin and the side of the arm 2. The head 8 of the pivot pin is shown somewhat dished and presenting a sharp edge 23 e'ngaggin the arm 1, whereby a dusttight fit will e ture.' The head 8 th 'acts vas' a dust-guard.

Upon relativemovement of the parts of the vehicle'to which the pair orarms land 2 ment of the parts resisted tothe extent,

and the arm 3 are respectively connecte,d,the friction, adjusted and regulated by means of the nut 17 will be applied, and the movedesired.

It is sometimes desirable to distribute the friction andnotonly havethe friction applied at the point'of pivotal. connec'tionbetween the upper'and the lower arms, but also to have the ends of thesearms where pivoted to the vehicle parts rovided with frictionapply'ing devic'es. uch devices are illus trated herein.

' In Fig. 4 the connection for the'upper arm "vehicle. It'has a pivot portion 2?, about; which the arm, 3 will oscilla te upon, the 'rela in Fig. 1'. (the single arm 3), is illustrated,

which comprises a pivot pin and attaching member,-having a portion 26 for attachment the vehicle,,a's for'instance, the body of the ad. at his side of the structive movement of the vehicle parts. A bushing 28 is mounted upon the pivot-pin-portion 27. The'arm 3 is provided withan eye of much greater radius than the radius of the bushing and :between this eye and the bushing 28' is interposed'a bushing 29, which has a working fit upon the bushing 28. .The bushing 29 is carried by a disk 30, which engages ,one side ofthe arm'3, andin connection with a disk 31, which lies upon the other side of the arm'andsurrounds the bushing'29, is riveted to thearm 3. The

disks-30 and 31 receivefrictional engage- I ment,..preferably from washers32, n'iadeof' some suitablematerial, as for instance, that referred to in connectionwith the central frictional portion of the device. These friction washers 32 are shown mounted in washer cups 33, one of which engages a collar 34, at the end of the pivOt-pin-poitioh 27 and the other of which engages the back face of the nut 35," which is mounted on the screw-threaded-portion 36 of the attaching member, and holds the parts of the device together and regulates the friction between the parts. The bushing 28 is illustrated in side elevation in Fig.7 and in spread-out detail in- Fig. 8. It isprovided with longitudinally-extending lugs 37, which at one end enter sockets 38, in the collar 34, passing through lateral openings 39, in thecups lugs '15 pass through the. lateral openings 14 in the cups 12. The lugs 37 at the other end of the bushing engage similar lateral open-' ings in the cup 33 at that end.- .By this: meansthe friction 'cups which receive the friction of the Washers 32, will be held from,- niovein'ent relative-tothe collar 34, the nut 35, and 'the pivot pin-portion 27. Thewear between. the'arm 3,-which is of sheet metal,

and the pivot pin 27, willbe minimized, since this arm carriesthe elongated bearing 7 surface, the bushing29, which engages the 'bushin 28. f l

The ushing 28, as well as the bushingv 10,

'33, somewhatin the manner in which the l mayupreferably be made out of sheet metal of suflicient hardness to present aproper bearin surface andfof sufiic'rent elasticity 0r resiiency that may have a close and clinging contact 'withthe .pivot pinupon the bushing and the pivot pin, but there will connection between the bushing and the;

pivotpin will relieve to a large extent the which it is mounted, so that not only will' there be an absenc of movement, between strain upon thelu's, which are. intended to revent the parts rom moving, The memer compris'ingjthe bushing 22 and the diskj 30 is illustrated in elevation in Fig. 10. 1n some convenient manner to a portion of Not only is this portion of the device ad vantageous in affording this close fitbetween the ,pivotpin .and'the bushingybut itdee;

, creases the cost of manufacturing this part from the other there extend two sheet metal which they may be hardened to the desired degree.

'l'he friction device for the lower arm of Fig. 1, that is, the pair of arms 1 and 2, is illustrated in Fig. 5. In this instance, instead of the member illustrated in Fig. 10

embodying the bushing29- and disk 30 in conjunction with the disk 31, there is employed a device illustrated in Fig. 11, -em-. bodying a bushing 41, having a centrallydisposed disk 42, which is interposed be-v veen the free ends of the arms li and 2 and which affords a bearing between said arms 1 and 2 and the pivot pin, in the present illustration the pivot pin 27 surrounded by its bushing 28. In other respects the friction member for the lower 'arm is'shown substantially the same in construction as is the friction member for the upperlarm. In considering the upper arm and its connec-' tions, it will be noted that the bushing 29 is longer than it need be simply to pass through the opening in the arm 3, and that the surplus portion of rounded by the disk 31; By theaddition of thisdisk 31 and the elongated bushing 29, the center bushing, the pivot pin, and the associated parts may be made thesamc and interchangeable for the upper and for the lower arms; and furthermore the structure when assembled and in--use will present the same appearance forthe upper and for the lower arms, with the exception that from one there eXtendsone sheet metal arm and arms.

I claim:

1. In a shock absorber, the combination with a pair of sheet metal arms, of a sheet metal arm interposed between these, frictionv washers between. the side faces of the interposed arm and the adjacent faces of the arms of the pair, and members interposed between each Washer and the adjacent arm of the pair, and a bushing on the pivot pin, said bushing being provided with lugs, and the arms of the pair and theinterposed members being provided with slots for engaging said lugs, said members being thereby rendered operable in unison with said arms.

2. In a shock absorber, the combination with a pair ofarms, one a double arm and one a single arm, the end of the single arm tation o with a pin provided with der, of a bushing mounted upon the pin and I the bushing is sur- I bushing.

being located between the ends of the double lugs'engaging'the friction members and the double -arm members for preventing independent relative angular movement of'these parts, said bushing being capable of movement with said friction members and said double'arm members;

3- In a shock absorber, the combination with two arms of a pin, a bushing mounted on the pin and engagin one of the arms for preventing rothe bushing relatively to sucha'rm and affording a bearing for the other arm.

4. In a shock absorber, the combination a'socketed shoulhaving integral lugs at each end, the lugs on the pivot adjacent the provided with integral lugs at one'end engaging the said sockets,'an arm movable relatively to such bushing, wear plates mounted upon the pin, and provided with recesses for receivingithe lugs at the respective ends of'the bushing for preventing relative rotation between the pin and the wear plates.

5. In a shock absorber, the-combination with, a pivot pin, of relatively-movable parts mounted u on said ivot pin, asplit spring bushing provided with lugs and clampingly engaging said pivot pin, the lugs engaging some of said relativelyholding these from movement relativ? tothe movable parts for' '6. In a shock absorber, theccombination with a pair of arms, of a pivot pin for pivoting these tc ether, and-a pivot pin 61. pivoting the I vehicle part, a s lit spring bushing-mounted on each of sai pivot pins, and members for frictionally mounted on the said pivot pinsand engaged bythe' said bushings.

7. In a shock absorber, the combination with a pair of sheet metal metal arm interposed therebetween, a member in engagement with each' of. the inner faces of said pair of arms, friction washers contained within said members and in engagement with the intermediate arm, rotatable on said pivot pin and in engagement with each of said members and with said pair of arms, and movable therewith,

said Washers and said intermediate arm beof said pair ofvme'mbers, a member in engagement with the inner surface of each of said pair of members, a pair of friction washers engaging the said arms arms, of a sheet opposite surfaces of the a pivot pin, a bushing.

ree'ends of each arm to a 9. In a shock absorber, the Combination" with a bifurcated arm, of an arm interposed 'therebetween, a retaining member men;

.each of. said retainin members and in engageme'nt with'said mtermedi'ately located arm, a pivot pin, a bushing rotatable thereon,

and in concurrently operable engagement movable engagement with gagement with the inner faces of said bifu rcated arm, a friction washer located within i with said retaining member's'and with said bifurcated-arm; said washers and said intermediatearm being rotatable independently of said bushing, and 9. member in fixed engagement with said intermediate arm .ijmd m taining members;

1 v, encl -of-said re- In witness whereoflfhay e hernnto set'.

"witnesses.

my hind in th'e presence of two subscribing Witnesses; I LOUIS Mnsmnonn, Jno. A. Ihnwronn'. y l

" EDWARD'Vi HART Rb 

